Here is a list of things that are different, I posted this on TMK a long time ago.
Damage for certain characters being reduced, projectile recovery time increased for certain characters, adding the jump punch and jump kick starters for auto combos, added characters, stages, codes, hidden characters, victory rewards, computer AI is entirely different, added moves for some characters, roundhouses push you out of the corner, added combos for some characters, slight changes on certain move properties.
Here are some specifics:
Kabal combo damage reduced by about 10% total
Kabal's spin can only be done once per combo, so you can spin in air, and then spin them again as they fall.
Jax single missile has huge recharge time.
Stryker has a riot gun (added move)
Sonya and Liu Kang have pop up combos (Making Sonya even more dangerous)
Sonya's leg grab now counts as part of a combo, and does 5%-2.5% after 3 hits or more juggled instead of full damage (In MK3 HP HP JK, Leg grab 4 hits 50%, 33% in UMK3)
Sub-zero's ice clone, does not freeze an opponent if you are too close to them, and this was an ENORMOUSLY ridiculous abusable tactic in MK3 that completely drops the character's tier level down.
Kung Lao's spin collision box is entirely weak in MK3 and doesn't turn on damage protection.
Cyrax's air throw doesn't count as part of a combo and his regular throw doesn't turn on damage protection, count as part of a combo, and does far more damage in MK3. (MK3 throw, LP juggle, air throw 3 hits 43%, 3 hits 17% in UMK3 but says 33%)
Nightwolf's shoulder tackle has a very slightly longer recovery time in MK3 I believe, could be my mind playing tricks on me.
Liu Kang can legitamately get his 7 hit combo after the bicycle kick in MK3 and cannot in UMK3
The corner roundhouse thing makes combos like 5 roundhouses in one from Kabal possible which is INsane. aa RH spin, RH, RH, RH, RH, LK = 100%
Matt
